81400620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193811}}^1$

素因数の和:193830

約数の個数: 48

約数和(自身を含む): 260483328

約数和(自身を除く): 179082708

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 193811, 387622, 581433, 775244, 969055, 1162866, 1356677, 1938110, 2325732, 2713354, 2907165, 3876220, 4070031, 5426708, 5814330, 6783385, 8140062, 11628660, 13566770, 16280124, 20350155, 27133540, 40700310, 81400620]

約数ペア:

[(1, 81400620), (2, 40700310), (3, 27133540), (4, 20350155), (5, 16280124), (6, 13566770), (7, 11628660), (10, 8140062), (12, 6783385), (14, 5814330), (15, 5426708), (20, 4070031), (21, 3876220), (28, 2907165), (30, 2713354), (35, 2325732), (42, 1938110), (60, 1356677), (70, 1162866), (84, 969055), (105, 775244), (140, 581433), (210, 387622), (420, 193811)]